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Finding the Fourth Proportional to 116.62, 173.71 and 115.20

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Solution

The fourth proportional to 116.62, 173.71 and 115.20 is: 171.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    116.62 : 173.71 = 115.20 : x
  2. Step 2: Convert to fraction form
    116.62/173.71 = 115.20/x
  3. Step 3: Cross multiply
    116.62x = 173.71 × 115.20
  4. Step 4: Simplify right side
    116.62x = 20,011.39
  5. Step 5: Solve for x
    x = 20,011.39/116.62
  6. Step 6: Final answer
    x = 171.59

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.